Drawing-rolls for spinning-frames



(No Model.) 2 SheetsSheet 1.

J. M. DUNHAM & J. MQKEM'MIE.

DRAWING ROLLS FOR SPINNING FRAMES, &o.

Patented Nov. 13, 1888.

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IN Hill 1 x 1 attm'nu za l piiimeowo (No Model.) 2 SheetsSheet 2.

J. M. DUNHAM & J. MOKEMMIE.

' DRAWING ROLLS FOR SPINNING FRAMES, am. No. 392,950. Patented Nov. 13',1888.

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MW W W I H UNITED STATES JOSEPH M. DUNHAM AND JOHN MOKEMMIE, OF HOLYOKE,ASSIGNORS OF ONE-THIRD TO BENJ. F. NICHOLS, OF SPRINGFIELD,MASSACHUSETTS.

DRAWING-ROLLS FOR SPINNING-FRAMES, 800.

SPECIFICATION forming part of Letters Patent No. 392,950, dated November13, 1888.

Application filed May 9, 1858. Serial No. 273,325.

To aZZ whom it may concern.-

Be it known that we, J osnrrr M. DUNHAM and JOHN MOKEMMIE, citizens ofthe United States, residing at Holyoke, in the county of Hampden andState of Massachusetts, have invented new and useful Improvements inDraw described, and pointed out in the claims.

In the drawings forming part of this specification, Figure l is an endelevation, partly in section, and Fig. 2 is a side elevation, alsopartly in section, of two fiber-drawing rolls constructed according toour invention, said figures showing a frame or portions thereof in whichsaid rolls are adapted to be rotated. Fig. 3 is a perspective view ofone of said rolls. Fig. 4 is a perspective view of an end collar of theroll. The parts of Fig. 1 which are shown in section are taken about online a: .r, Fig. 2, and the parts in Fig. 2 shown in section are takenabout on line 3 y, Fig. 1.

In the drawings, 3 and 4 represent, respectively, the upper and lowerrolls of one of the three pairs of drawing-rolls, which are usuallymounted in a frame side by side and constitute a drawing-head, thesliver operated upon passing between the several pairs of rolls insuccession in a manner well-known to those familiar with such machinery.The said drawing-rolls 3 and 4 are supported one above the other in thevertically-slotted standards 5 of the roll-frame, and rotary motion isimparted to each pair, ordinarily, through a gear, 6, on one end of thelower roll, having suitable engagement with otherrunning-gear- 1ng.

H eretofore other drawing-heads than those having rolls arranged inpairs consisting of one (the lower) made of metal, with a series oflongitudinally-running fiat-bottomed grooves in its surface, and theupper one, also of metal, not grooved, but covered with leather, have(No model.)

been but little known. The said leathcr-covered roll is used with saidmetal one in order to provide a yielding surface on the pressure-roll toavoid crushing the sliver,and the said lower 5 5 roll is grooved, asdescribed, to enable it to better engage with said sliver. Owing to theconsiderable cost of often re-covering said leather-covered rolls,efforts have been made to use grooved metal rolls for both top andbottom rolls, so arranging or supporting said rolls that their ribs andgrooves roll in direct contact when no sliver is passing between them.

The improvements in drawing-rolls herein shown and described providesaid rolls with adjustable bearings thercbetween, whereby the axes ofthe rolls are made adjustable toward and from each other for the purposeof preventing them from rotating in contact with each other and forbringing the interoperat- 7o ing-surfaces of the ribs and grooves ofeach pair ofrolls into such relation to each other that the sliver-spacebetween them shall be of such depth or dimension as causes the sliver tobe sufficiently compressed between the rolls, 7 5 (within its elasticcapabilities,) whereby said sliver is made to positively move or bedrawn along in consonance with the surface movement thereof withoutdanger of crushing or cutting the fibers of the sliver,whether the upperroll be weighted or not. The said drawing-rolls 3 and 4 are for thepurposes of this invention made preferably with groovesa and ribs 0, ofV shape, as shown; or, in other words, each of said ribs is oftriangular form in cross-section, as plainly seen at the end of theroll, and the formation of such ribs a naturally results in theproduction of correspondingly-shaped grooves 64 therebetween.

The practical advantages pertaining to d rawing-rolls having theV-shaped ribs andgrooves, as described,are that the edges of thegrooves, more or less acute, afford vastly more efficient means for therequisite engagement of the ribs with the sliver than do ribs havingcurved or 5 half-rounded edges, and under equal contact conditions ofoperation upon a sliver the rolls herein shown would draw it,while therolls with roundedged ribs would slip over it.

The means for maintaining the rolls 3 and4 IOO in such positions thattheir axes are so separated, as shown, that the edges of the ribs of oneroll do not reach the bottoms of the grooves in'the other roll areillustrated in Figs. 1 to 4, inclusive, and areas follows: One of saidrolls (the upper one, 3, is shown so fitted in the drawings) has acircular collar, 7, secured on each end thereof by akey, 8, or by screwspassing through said collar. into the end of the roll, or by othersuitable means,whereby one pair of collars may be replaced by anotherpair having a greater or less diameter. The peripheries of said collars7 bear upon and rotate in contact with those portionsb of the oppositeroll between its journals and the adj oining ends of its grooved part,and said collars are of such diameter that they allow oftheinterlocking, more or less, of the ribs and grooves of the two rolls,but prevent the edges of the ribs from ever touching the bases of theopposite grooves, as shown. The said collars 7,attaehed to the saidrolls, as described, provide adequate means for holding said rolls intheir said partiallyseparated relations while they rotate or ofadjusting the degree of such separation to suit the sliver to beoperated upon. It is obvious that the said drawingrolls 3 and 4 may whenapplied to a machine to be run unchangingly on slivers of a given weightper yard or of uniform size have said collars 7 permanently fixedthereon to maintain the roll which they support in a certain fixed butseparated relation to the opposite roll; or, in other words, the rollsare so controlled that their ribs and grooves only partially interlock,as shown in Fig. 1.

What we claim as our invention is l. A pair of drawing-rolls for fibrousmaterials,having longitudinal ribs and grooves normally interlockingwith each other during their rotation, combined with bearings for one ofsaid rolls,whereby the axes thereof are held at such degree ofseparation that the edges of the ribs of one roll have no contact withthe bottom of the grooves of the opposite roll, substantially as setforth.

2. Apair of ribbed and grooved drawingrolls for fibrousmaterials,normally interlocking with each other during theirrotation,combined with interchangeable bearings for one of said rolls,whereby the axes thereof are held at varying degrees of separation,substantially as set forth.

3. A pair of drawing-rolls for fibrous materials, having longitudinalribs and grooves normally interlocking with each other durlng JOSEPH M.DUNHAM. JOHN MCKEMMIE.

WVitnesses: I

H. A. OHAPIN, G. M. CHAMBERLAIN.

